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Finding the Fourth Proportional to 208,792.40, 313,187.10 and 51,019.40

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Solution

The fourth proportional to 208,792.40, 313,187.10 and 51,019.40 is: 76,528.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,792.40 : 313,187.10 = 51,019.40 : x
  2. Step 2: Convert to fraction form
    208,792.40/313,187.10 = 51,019.40/x
  3. Step 3: Cross multiply
    208,792.40x = 313,187.10 × 51,019.40
  4. Step 4: Simplify right side
    208,792.40x = 15,978,617,929.74
  5. Step 5: Solve for x
    x = 15,978,617,929.74/208,792.40
  6. Step 6: Final answer
    x = 76,528.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.